S-91970A638 3/8"-16 x 3" Plastic Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to durable nylon plastic construction, eliminating rust and chemical degradation in harsh environments
• Wide temperature tolerance from -40° to 185°F ensures reliable performance in both extreme cold and high-heat applications
• Precise Class 2A thread fit guarantees smooth installation and secure fastening with reduced risk of cross-threading
• External hex drive design with 9/16" head width allows for high-torque application using standard tools, speeding up assembly
• RoHS 3 compliance meets strict environmental regulations, making them suitable for global supply chains and eco-conscious industries
• Partially threaded shank provides enhanced grip and vibration resistance in materials where full threading isn't required
• Coarse UNC thread pattern enables quick engagement and strong holding power in plastic, wood, and soft metal substrates

Professional Applications & Engineering Value

These 3/8"-16 UNC nylon hex head screws are engineered to address common industrial challenges like electrical insulation, chemical exposure, and weight reduction without sacrificing strength. The black nylon material provides inherent non-conductivity, making them ideal for electrical enclosures, control panels, and marine equipment where metal fasteners could cause short circuits or galvanic corrosion. Their coarse thread design ensures rapid installation in plastic housings and composite materials, while the partial threading minimizes material stress and prevents loosening under vibration. With a -40° to 185°F temperature range, they maintain dimensional stability in outdoor, automotive, and HVAC applications, offering a lightweight, durable alternative to steel fasteners.

Specification Summary & Compliance

Manufactured to precise UNC coarse thread standards with Class 2A thread fit for consistent dimensional accuracy. The screws feature a 3" length with 1" minimum thread length, 9/16" head width, and 17/64" head height for standardized tool compatibility. Fully compliant with RoHS 3 (2015/863/EU) regulations, ensuring absence of hazardous substances. The right-hand thread direction and external hex drive align with industrial assembly conventions for seamless integration into existing processes.